72 Statistics of the Flora of the Northern States. 
118, or 35 per cent, do not pass north of lat. 55°. 
155, or 484 per cent, do not pass north of lat.60°. + 
218, or 68 per cent, scarcely, if at all, cross the Arctic circle. 
Potentilla rove * or the plant of the White es which 
I take for it, has not been elsewhere found in this country (unless 
confounded with some other species) except vo Greenland, be- 
tween lat. 78° and 80°, by Dr. Kane; nor is it known in the 
north of Europe! 
Sibbaldia mbens, although found in Labrador and Green- 
land on one side, and on the northern Rocky Mountains and at 
aschka on the other, has not been detected in Arctic Amer- 
ica within the Arctic circle. 
Gnaphalium supinum, a rare plant of the White Mountains, 
has been elsewhere detected upon the continent only at i ene 
and it also occurs in Greenland. 
stope hypnoides, found on all our alpine summits, elsewhere 
occurs only in Labrador and Greenland, on the one hand, and 
at Unalaschka, below the Arctic circle, on the other. 
Phyllodoce tasifolia — only on the White Mountains, in 
Labrador, and in Greenl 
Veronica alpina, sithougti . approaching the Arctic circle both 
pe — west, is not recorded as crossing it, though it probably 
” Salice phylicifolia occurs only on the White Mountains and in 
Labrador. 
Juncus trifidus, an abundant plant in our alpine districts, is 
not recorded from any other part of North America, excepting 
N ole P oo iy puis 
arex capttata, although found on — n’s yee and on the 
meres Mountains, is are recorded from the Arctic circle. 
Teta = t recorded from within the Arctic circle. On the 
other ye Fira atropurpurea, a Lapland spree: oc on bf 
* The habitat of this rare plant has been casually left 
any of N. U. States, p.118. It was discovered, bof mer by (rh 
has long been of the most zealous and successful 
botany), at wm station in a Mouiie of er 
man detected it cu Mount Lafayette, of te Franconia range 
_ stations known dn this coutes 
